While it was very open and accepting to some, it seemed to outlaw and shun most others who did not fit that "elite" categorization. These narratives propagated by the media influenced the large movement of teenage users from one social networking service to another. Use by extremist groups According to LikeWar: The Weaponization of Social Media (2018) by P.W. Singer and Emerson T. Brooking, the use of effective social media marketing techniques is not only limited to celebrities, corporations, and governments, but also extremist groups to carry out political objectives based on extremist ideologies. The use of social media by ISIS and Al-Qaeda has been used primarily to influence operations in areas of operation and gain the attention of sympathizers of extremist ideologies. Social media platforms like YouTube, Twitter, Facebook, and various encrypted-messaging applications have been used to increase the recruiting of members into these extremist groups, both locally and internationally. Larger platforms like YouTube, Twitter, and various others have received backlash for allowing this type of content on their platform (see Use of social media by the Islamic State of Iraq and the Levant). The use of social media to further extremist objectives is not only limited to Islamic terrorism, but also extreme nationalist groups across the world, and more prominently, right-wing extremist groups based out of the United States. 2021 United States Capitol attack As many of the traditional social media platforms banned hate speech (see Online hate speech), several platforms have become popular among right-wing extremists to carry out planning and communication of thoughts and organized events; these application became known as "Alt-tech". Platforms such as Telegram, Parler, and Gab were used during the 2021 storming of the US Capitol in Washington, D.C. The use of this social media was used to coordinate attacks on the Capitol. Several members within these groups shared tips on how to avoid law enforcement and what their plans were with regards to carrying out their objectives; some users called for killings of law enforcement and politicians. Deceased users Social media content, like most content on the web, will continue to persist unless the user deletes it. This brings up the inevitable question of what to do once a social media user dies, and no longer has access to their content. As it is a topic that is often left undiscussed, it is important to note that each social media platform, e.g.,